Hydrotherapy is a form of physiotherapy that uses water to aid in the rehabilitation of musculoskeletal injuries and neurological conditions. It involves exercises that are performed in a pool or other water-based environment. The buoyancy of the water reduces the weight bearing on the joints, making it easier for patients to move and exercise without causing further injury or pain. The water also provides resistance, which can help to strengthen muscles and improve range of motion. Hydrotherapy can be beneficial for a variety of conditions, including arthritis, back pain, joint pain, and post-surgical rehabilitation. It is often used as part of a comprehensive physiotherapy treatment plan.